Influence of Motion Parameters on Cutting Performance of Boom-Type Roadheader During the Swing Cutting
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RESEARCH ARTICLE-CIVIL ENGINEERING
Influence of Motion Parameters on Cutting Performance of Boom-Type Roadheader During the Swing Cutting Deyi Zhang1,2 · Songyong Liu1,2
· Jiguang Jia1,2
Received: 30 May 2020 / Accepted: 17 September 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract The cutting performance of the boom-type roadheader impacts the energy consumption and efficiency of coal mine roadway excavation. The purpose of this work is to investigate the influence of motion parameters on cutting performance. The motion of the cutting head during swing cutting was simplified to establish a numerical model. Rock samples were arranged to perform the swing cutting to test the validity of the numerical model based on the coal-rock cutting platform. The cutting specific energy consumption and the average cutting force on picks involved in cutting were used as indexes to evaluate the effects of the cutting depth, velocity, and subsequent cutting distance on cutting performance. The mechanism of the cutting head was also explained. The results show that the cutting performance is optimal when the cutting depth is 1/2 to 2/3 of the cutting head length. In terms of energy consumption, cutting performance is more sensitive to cutting depth than to cutting velocities. The cutting performance indexes tend to be stable until the subsequent cutting distance exceeds the diameter of the cutting head. Keywords Cutting performance · Motion parameters · Swing cutting · Cutting performance indexes
1 Introduction Boom-type roadheaders are critical to the excavation of underground coal mine roadways. As the coal mine recovery rate has improved, as well as the mechanisation and automation of mining have developed, the speed of excavation has become a significant focus for improving the efficiency of coal mining [1]. The overall performance of a roadheader includes operation, control, and cutting performance, among which cutting performance is the most important contributor [2]. The cutting performance of a roadheader is reflected in its rock breaking ability, which is realized by the movement of the cutting head installed on the cutting arm. External factors that affect cutting performance are the geological structure and coal-rock characteristics, whereas internal factors include the pick material, structure, arrangement, and
B
Songyong Liu [email protected]
1
School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu Province, China
2
Jiangsu Collaborative Innovation Center of Intelligent Mining Equipment, China University of Mining and Technology, Xuzhou 221008, Jiangsu Province, China
cutting motion parameters [3–5]. External factors affecting roadheader performance are variable and uncontrollable; therefore, internal factors must be considered to improve cutting performance. The pick cutters are the components that interact directly with the rock. Investigation into the cutting performance of the roadheader firstly focuses on the pick cutters. A cutting theory and
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